Constant overload – Sonics E-Series User Manual
Page 19
27) Reinsert main board into chassis and fasten with the 6 screws removed in disassembly. Reconnect all
harnesses (don’t forget the ground wire from Step 3).
28) Reconnect all cables and turn the power supply on. Check the DC Voltage as shown below. If it does not
fall within 1 volt, please contact us to send the the unit in for repair. If it checks out okay, try welding a part. If
there is still a problem, please contact Service at 203-270-4600.
Constant Overload
• If the power supply
constantly overloads,
check the voltage across
the 4 filter capacitors
shown to the left. The
compared voltages
should be within 1VDC of
each other.
If the voltage’s across the 4 caps are out of balance, the most likely cause is a
shorted transistor in one of the banks directly behind the capacitors. Replace the
failed transistor and verify the balance.